Information

ManualsBrandsMICROCHIP TECHNOLOGY ManualsIntegrated Circuits (ICs)Timer IC t- real time clock Clock/calendar SOIC 8

Information subject to change. The Microchip name and logo and the Microchip logo are registered trademarks and PICDEM and PICtail are trademarks of Microchip Technology Incorporated in the U.S.A. and

DS20005074B

Visit our web site for additional product information and to locate your local sales office.

Microchip Technology Inc. • 2355 W. Chandler Blvd. • Chandler, AZ 85224-6199

www.microchip.com/clock

Low-Cost Real-Time Clock Calendar Portfolio

Product Pins Interface

Battery

Back-up

Protected EEPROM

Area (bits)

Protected

EEPROM Contents

General Purpose

EEPROM (Kbits)

Watchdog Timer

and Event Detects

MCP7940M 8 I

C™ – – N/A – –

MCP7940N 8 I

– N/A – –

MCP79400 8 I

64 – – –

MCP79401 8 I

64 EUI-48 – –

MCP79402 8 I

64 EUI-64 – –

MCP79410 8 I

64 – 1 –

MCP79411 8 I

64 EUI-48 1 –

MCP79412 8 I

64 EUI-64 1 –

MCP79510 10 SPI

128 – 1 –

MCP79511 10 SPI

128 EUI-48 1 –

MCP79512 10 SPI

128 EUI-64 1 –

MCP79520 10 SPI

128 – 2 –

MCP79521 10 SPI

128 EUI-48 2 –

MCP79522 10 SPI

128 EUI-64 2 –

MCP795W10 14 SPI

128 – 1

MCP795W11 14 SPI

128 EUI-48 1

MCP795W12 14 SPI

128 EUI-64 1

MCP795W20 14 SPI

128 – 2

MCP795W21 14 SPI

128 EUI-48 2

MCP795W22 14 SPI

128 EUI-64 2

Power-Fail Time-Stamp Development Tools from Microchip

To support our Real-Time Clock/Calendar products, we

offer two PICtail™ daughter boards, each with a

characterized crystal oscillator circuit and an on-board

coin cell battery for use as a back-up supply. Compatible

code development platforms include the PICDEM™ PIC18

Explorer Board (DM183032) and the Explorer 16

Development Board (DM240001).

Supply

Voltage

Time

Battery

back-up

switch over

voltage

Time captured

by power-fail

timestamp

Time captured

by power-up

timestamp

Loss of

system power

MCP795XX RTCC PICtail

Daughter Board

(AC164147)

MCP79410 RTCC PICtail

Plus Daughter Board

(AC164140)